PWIM is a relatively new model of teaching literacy developed by Emily Calhoun over 20 years. It focuses on constructing knowledge of printed language through extensive reading, sight word development, and comprehension skills. The model uses large pictures as a stimulus for students to "shake out" or identify words, which are then spelled, read, and associated with the pictures. Students progress to arranging words into sentences, reading more trade books, and naturally connecting reading and writing. PWIM provides multiple opportunities for explicit instruction and leads students to concept formation through inductive activities ideal for primary grades and ESL learners.